The LL cans will not fit in the 2.6, but the L cans will. You loose about 100 rpm from what you get with the LL cans, but the transition is great and it will turn a mejzlik 28-10 at 6700, way to much prop ripping for IMAC. The shorter the headers the better, I used the KS flanges in to a 90 degree bend and then about a 3/4" straight pipe just enough to make the coupler work. I also cut a 1/2" off of the inlet tube in the canister. I use a mejzlik 25-12-3 at about 6000 rpms. Good luck, you will love it.

Big Bob